This line is mainly used to produce large diameter PE heat reservation pipe. The products are mostly used as the outside layer of the warm supply pipe, whose middle layer is PU foam and inside layer is steel pipe. It also can be used to produce water supply pipes, drainpipes etc. This line mainly consists of RM series extruder, die, water cooling tank, hauling-off unit, cutting machine, pipe clipping unit, frame and electrical controlling parts etc.